config.py
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#!/usr/bin/python
# AppRecommender - A GNU/Linux application recommender
#
# Copyright (C) 2010 Tassia Camoes <tassia@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import getopt
import sys
import os
import logging
from ConfigParser import *
class Config():
"""
Class to handle configuration options.
"""
def __init__(self):
"""
Set default configuration options.
"""
self.debug = 0
self.output = "/dev/null"
self.config = None
self.tags_db = "/var/lib/debtags/package-tags"
self.tags_index = "~/.app-recommender/debtags_index"
self.axi = "/var/lib/apt-xapian-index/index"
self.axi_values = "/var/lib/apt-xapian-index/values"
self.strategy = "ct" # defaults to the cheapest one
def usage(self):
"""
Print usage help.
"""
print " [ general ]"
print " -h, --help Print this help"
print " -d, --debug Set debug to true. Default is false."
print " -o, --output=PATH Path to file to save output."
print " -c, --config=PATH Path to configuration file."
print ""
print " [ recommender ]"
print " -t, --tagsdb=PATH Path to debtags database."
print " -i, --tagsindex=PATH Path to debtags dedicated index."
print " -a, --axi=PATH Path to Apt-xapian-index."
print " -s, --strategy=OPTION Recommendation strategy."
print ""
print " [ strategy options ] "
print " ct = content-based using tags "
print " cta = content-based using tags via apt-xapian-index"
print " cp = content-based using package descriptions "
print " col = collaborative "
print " colct = collaborative through tags content "
print " colcp = collaborative through package descriptions content "
def read_option(self, section, option):
"""
Read option from configuration file if it is defined there or return
default value.
"""
var = "self.%s" % option
if self.config.has_option(section, option):
return self.config.get(section, option)
else:
return eval(var)
def load_options(self):
"""
Load options from configuration file and command line arguments.
"""
try:
self.config = ConfigParser()
self.config.read(['/etc/apprecommender/recommender.conf',
os.path.expanduser('~/apprecommender.rc')])
except (MissingSectionHeaderError), err:
logging.error("Error in config file syntax: %s", str(err))
os.abort()
self.debug = self.read_option('general', 'debug')
self.output_filename = self.read_option('general', 'output')
self.config = self.read_option('general', 'config')
self.tags_db = self.read_option('recommender', 'tags_db')
self.tags_index = self.read_option('recommender', 'tags_index')
self.axi = self.read_option('recommender', 'axi')
short_options = "hdo:c:t:i:a:s:"
long_options = ["help", "debug", "output=", "config=",
"tagsdb=", "tagsindex=", "axi=", "strategy="]
try:
opts, args = getopt.getopt(sys.argv[1:], short_options,
long_options)
except getopt.GetoptError, err:
logging.error("Error parsing args: %s", str(err))
print "Syntax error"
self.usage()
sys.exit()
for o, p in opts:
if o in ("-h", "--help"):
self.usage()
sys.exit()
elif o in ("-d", "--debug"):
self.debug = 1
elif o in ("-o", "--output"):
self.output = p
elif o in ("-c", "--config"):
self.config = p
elif o in ("-t", "--tagsdb"):
self.tagsdb = p
elif o in ("-i", "--tagsindex"):
self.tagsindex = p
elif o in ("-a", "--axi"):
self.axi = p + "/index"
self.axi_values = p + "/values"
elif o in ("-s", "--strategy"):
self.strategy = p
else:
assert False, "unhandled option"